If you could use a socket with wires attached, a .1 inch spaced 2 pin header connector works very well, available at All Electronics (Con-242) or eBay. PM me if further info needed.Obtain some of these, Turned Pin SIL Sockets 2.54mm - Great for Arduino -Various ways/packs -UK Seller | eBay, from
an USA or Far Eastern supplier, snap a block of two off to then make this. Simples!
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These are from the German supplier, Steck-Lampenfassung 10 Stück ML-Train 83501007 similar to your Trainli at 2-pin socket or try here at AllAboutLGB: A Factory authorized Massoth Electronics USA dealer, bottom of the page.
Train Li also shows a similar item on their website (www.trainli.com). TrainLine™ 2-pin socket (5 pcs). They are also really great to deal with.AllAboutLGB.com has them in stock according to their Website. $15.90 + S&H per 10 pack. You might see some other goodies there too while you're looking! I think they're in your neck-of-the-woods if you want to check them out in person. I've had very positive interactions with and highly recommend them.
I did find them there, thank you! I'd hate to buy just one thing (and it's so small!), but I may need to if I cannot find the other lanterns I'm looking for. (This plan is very fluid and it keeps changing!)