Jimmi
The M1A in black is using a Synthetic stock. This stock is probably better than a wood stock. But I understand why you might prefer wood.
For wood stocks you have several choices. You can buy a USGI M14 stock and your rifle should slip right in. They come in prices from $10 up to several hundred for a show peice. Be warned that they have a cutout section for the M14 selector switch which the M1A doesn't have. It can be filled by isn't perfect.
Freds is the premiere supplier of them.
Or, you could go with a Springfield Armory one without the selector cut out. They are expensive.
Or, you could go to Sparrowhawks which makes really works of art including a fake selector if you wish to get that original USGI M14 look.
sparrowhawkm14.bizland.com/Sorry, I don't have all the urls handy just do a google.
For magazines, the M1A uses USGI 20 round M14 mags. Do NOT buy any aftermarket mags. Good USGI mags are very durable and you won't need many. I recommend going to Coles and buying them for $37 each or $360 for 10. URL is
www.coledistributing.com/Your AR10 was manufactured after the ban so there are no specific magazines over 10 rounds available. However, M14 mags can be modified to work in the AR10 with a kit from Armalite. The kits cost $30 each from Quantico Arms (I have not done business with them but have heard good things from others)
www.quanticoarms.com/asp/itemDetail.asp?dispItemNum=625&type=M&CMN=ArmaLite&CMNum=19&CMSNum=77&CMSN=AR10%20Parts%20&%20AccFor the M1A you should visit
www.battlerifles.comAnd for your AR10 visit the AR10 forum here.
Best of luck