I normally shop either at Squadron.com or Spruebrothers, but Squadron doesn't seem to carry much in the way of resin aftermarket sets (at least for anything I'm building) and spruebrothers seems to be difficult to search. Where do you tend to buy your aftermarket add-ons from?

In particular I am looking for a Cutting Edge cockpit for the 1/48 Tamiya Spitfire I (48329) which I saw used in a recent magazine article for this kit, but a google search turns up reviews but no stores. In general though, I'm looking for a good source for this stuff.

Hi rockhpi,
Try these sites.
http://www.quickboost.net/148.htm
http://www.cmkkits.com/
http://www.mastercasters.co.uk/8.html
http://www.ultracast.ca/
http://www.design-marketingintl.com/
http://www.master-model.pl/
Another source is Aries, but their site is under construction, but you can find their product (and many others) here
http://www.hannants.co.uk/

Unfortunatley Cutting Edge is OOP if I recall, they were owned by Meteor Productions and they went OOB awhile ago. Some of these companies have US distributors, some don't, but most of these sites have directories of where you can buy their products.

Also check out these webzines, lots of good info and links for the model builder.
http://www.aircraftresourcecenter.com/
http://www.hyperscale.com/
http://www.cybermodeler.com/index.shtml
http://www.internetmodeler.com/
http://modelingmadness.com/

Thanks, godzilla1985!