While there are some specialty mag pouch makers for Ruger 10-22 mags, I don't think I would want to show up with Multicam, 10-22 mag pouches mounted on my plate carrier.  YMMV, but I think the 10-22 is best done in an understated manner. I think that there are very cost-effective options to expensive, boutique mag pouches.  That said, everyone needs a practical way to carry multiple magazines, and with the 10-22, you'll want to carry a lot of them.

For the BX-25 Ruger mag, the Surplus East German AK-74 pouch is ideal.  Note, NOT AK-47 pouch.  Inexpensive, durable, and fits four BX-25 mags easily.  Brownish EG "Raindrop" camo.  Note that there is a side pocket on the AK74 pouch which is the perfect size for a coupled pair of 10-rd Ruger 10-22 mags.  If that is done, total capacity is 120 rds.
http://www.desertfoxsales.com/EAST_GERMAN_AK_POUCH_p/dfs-086eg.htm

Some folks are fans of the original 10-rd mag.  It so happens that there are magazine couplers available that will co-join up to four 10-rd mags.  I have heard that even in states that prohibit mags of over 10 rds, such co-joined mags are OK.  Check your local/State laws before going this route, if you live in a 10-rd max mag State.

I prefer 2 X10-rd mags, as that makes things simple for me,  If you are using two Ruger 10-rd 10-22 bags coupled at their bottoms, then this is the pouch for you The pouch easily holds three coupled pairs of 10-rd mags, giving a total of 60 rds.
https://www.libertytreecollectors.com/productcart/pc/viewPrd.asp?idproduct=1444

One can double-up 10-rd coupled mags in this pouch, but it is a bit of a PITA to do so, and impossible to re-insert the expended coupled mag into a cell that is already occupied by a loaded coupled mag.  Buy another pouch, of it is needed; Cheap enough.

There are any number of mag couplers currently available.  I'm familiar with the single-piece E&L Manufacturing dual coupler, which requires some ilicone adhesive for reliability.  Silicone adhesive is easy to get, has universal applications, and gives the option of carefully separating the components without damage.  I don't advocate permanently epoxying mags to the coupler.  Ruger 10-rd mags can be dis-assembled and cleaned, but why permanently co-join mags to a coupling device?  There are other, more modern, and more expensive dual mag couplers that rely on screws to affix the magazines to the coupler body.  No experience with such.  Magazine dust covers are available from Ruger, and less expensively on ebay, and I recommend their use under dusty/muddy conditions.  

Note:  I don't necessarily endorse either of the vendors whose pictures are linked above.  Do your own homework, and if you can find both pouches at one vendor, please reply with link.

You're welcome.  I don't say these pouches are for everyone, but they have served me well for years.  Editing done to above post, and content added.

Just google "10 22 magazine pouch molle".  Plenty of mag pouches out there.

They're out there as well; black, Foliage Green, Multicam.  About $!2 for a 2-cell pouch with PALS/MOLLE attachment.