Looking for a couple spares for IDPA.  Lots of .45 ACP ten rounders but no .40s.
Mec-Gar does not show .40s on their web page.

I know they're high, but get the nickel bodies. You won't be sorry:

www.ltms.com/bindex.htm

If I were you though, I'd call up Para and see if you can still get some high caps. They release them from time to time.

Call these guys too. They have nickel plated high caps. I don't know about ten rounders. I got my high cap nickel plated .45 mags from them. Great stuff.

www.practicalshooting.com/para-ordnance.html

The other place would be CDNN, but there's nothing on their web site as of now. Impact Guns may have some, but I don't see anything on their web site.

www.impactguns.com/store/para_ordnance.html

Hope this helps. I would just make your life easier and order them from Para Ordnance's pro-shop directly.