Welcome Rob... :)
Nice display set-up for your collection.... :thup:
As far as locating hard to find pieces, why not run a standing WTB (Want to Buy) advertisement in the Quartermaster Stores (click here).
You never know, maybe you'll stumble across another member about to put one up for sale who sees your ad and checks with you first. If you use some of your "Free" credits you can even make it a "Featured Ad" so that you get maximum exposure.
One piece of advice. If you do put up an ad, locate a pic of a No.4(T) and use it in your ad to show people what you're looking for. If you can't find one, we can help you with that. It's also an "eye grabber" that helps motivate people to read your ad further, as opposed to an ad that's just bland text.
Enjoy the system.... :beerchug:
Regards,
Badger