I got some great stuff at the Toronto Military Show. Here's a link.
http://www.torontomilitaryshow.com/
The next one is June 28. I picked up an entrenching tool in a p37 cover, MkVIII RAF goggles, an SMLE sling and a sten sling, all war dated, broad arrow marked. I came close to buying a leather jerkin that actually fit me.
Other than that, haunt antique stores and flee markets. I prefer Z L & T pattern 37.