Still you have some very good suggestions here. Here are some places to visit. Dumas Products ( www.dumasproducts.com)
Diels Engineering, Inc. (www.dielsengineeringinc.com) Brodak Mfg. and Dist. CO. ( www.brodak.com) Dare Design and Engineering Co. (http://brodak.com/spirit-of-yesteryear-kits.html) Easy Built models (WWW.EASYBUILTMODELS.COM)
I have converted some of Easy Built models - 50" wingspan - by increasing structure for small engines, .15-.35 for RC scale-like models.

A fine magazine can be found at carstens-publications.com This magazine can perform magic. It is NOT ALL RC - BS like the others which only provide information pleading the case for the advertisers. HA!