bought a piece on Craigslist from a guy for $20. big enough to do both side windows and back quarters. At that price I think I may just give it a try. The local lexan dealer $4.00 a square foot.
There is a reason for the Lexan -------- It's your safety !!!
God forbid anything were to happen and generally it doesn't, you stated your only running 11:50's but hit some oil or water on the big end or lose a motor, trans or rear or have a suspension component fail and it will be all over but the crying. Your life Your money but Safety isn't a good place to sacrifice $$$.
I have witnessed too many bad crashes and they weren't all blown nitro burning vehicles.