thanks for the info I went and ordered one under $30While I get that dollars add up, if you have all the other parts, the black stock itself isn't too expensive. AR15 Discounts has one for about $20 for just the stock (no buffer tube or screws). It's less than $30 with shipping. And if you happen to be a veteran, you can register with Verify Pass and get a 10% discount.
I know that doesn't answer your question but keeping as close to the original as possible may be more satisfying.
AAST13 - Presma AR-15 A2 Style Fixed Stock - AR15Discounts
A2 Style AR-15 Fixed Stock, Black. SKU AAST13 Does not come with screw or spacer.ar15discounts.com