All of the products listed here I have personally used or have had good reviews on them and I recommend them for your own build

Cockpit Kit	Dynamic Balsa and Hobby Supply	http://www.dbalsa.com/	more info
Miniature Piano Hinges	Nelson Hobby Direct	http://www.nelsonhobby.com/piano.html	more info
Laser Cut Kits	Precision Cut Kits	http://www.precisioncutkits.com/instock.html	more info
Plans	Dave Platt Models	http://www.daveplattmodels.com/	more info
G-10 Garolite	McMaster-Carr	http://www.mcmaster.com/nav/enter.asp?pagenum=3520	more info
Plastic Tubing	Plastruct	http://www.plastruct.com/
3.5 degree adaptors for Platt's T-28	Shindin Machine	http://www.shindinmachine.com/Miscstuff.html	more info
Scale Flap Hinges	John Ostmeyer	EMAIL	more info
Scale working propellers	NRG Research	http://www.soloprops.com/	more info
Engine Mark 1.8	Hobby People	http://www.hobbypeople.net/gallery/214213.asp	more info
Scale Muffler for Moki 1.8	Bisson	http://www.bissonmufflers.com/en/index.html	more info
Retract Air supply	Robart	http://www.robart.com/air_systems/airkits.aspx	more info
Filler putty	Evercote	http://www.evercoat.com/index.aspx	more info
T-28 walk around	grubby-fingers-aircraft-illustration.com	http://www.grubby-fingers-aircraft-illustration.com/trojan_walkaround.html
Scale Dummy Engines	Williams Brothers Model Products	http://www.williamsbrothersmodelproducts.com/rc.html	more info
Miniature nuts and bolts	Micro Fasteners	http://www.microfasteners.com

If you know of a good source for supplies or parts to build the T-28 please let me know so I can add it on this page