Living in Bra,pton, there are all sorts of places where you can get what you want without going on-line, whether it's a higher powered electric soldering iron or a torch. You can also get a soldering attachment for torches.

Try Princess Auto, Crappy Tire, Home Depot, Home Hardware, Lowes or any other large hardware store.

Before you attack the actual landing gear, it's a good idea to practice to learn how to do it well.

Bind the joints with fine wire first. Sig makes an excellent copper wire for that use. And some flux usually helps. Also remember, as already stated by rgburrill, that you heat the parts to be soldered to sufficient temperature that the solder melts when in contact with them. Don't touch or move the parts until the joint cools. If you are using silver solder you want to get it right. Taking that apart uses higher heat and can be a real P.I.T.A.