The Midwest Industries foregrip is the best I've seen but it's also the priciest. If you shop around you can find it for a little over $100. No plastic - it's all aluminum and very high quality. Make sure you get some rubber rail inserts no matter what rail you decide to go with.
Midwest Industries: AK47/74 Handguard
For a pistol grip you can't beat the Hogue.
Amazon.com: Hogue Rubber Grip AK-47/AK-74 Rubber Grip with Finger Grooves: Sports & Outdoors
I don't care much for collapsible stocks on AKs (just a personal preference) so I really couldn't help you there. I do have a Tapco folding stock on one of mine and it functions as advertised.
AKS-025 - AK-47 Folding Stock Tapco Intrafuse Black Resin No Gunsmithing Required Fits Stamped Receivers Only
(Insert random tough-guy quote here)
"See my gun?? Aren't you impressed?" - Anonymous sheepdog
Guns - the alternative to running for your life.