Welcome to shopping abroad, mate. Albion quoted $180USD to ship a sword to me! Most American companies charge me about $80 to ship weapons or armour. UK companies seem to have better shipping prices for me. In general it is cheaper for me to import, than to go to a local supplier. Local suppliers have a limited range of swords... that aren't made by Albion. I think you're wise in getting a few items at once. The prices won't change much for each subsequent item. Also given that you're in a country with a large population, your shipping should be better than trying to get something to a tiny island in the South Pacific with 64 million sheep, 4 million of whom think they're human.
I too have a GDFB arming cap. I haven't found heat an issue, but I don't wear it because I look like a baby in it, and I have trouble hearing. I usually wear a beanie. I sweat a lot in my GDFB [glossary]gambie[/glossary] (in fact it's outside in the sun at the moment, drying). But that's good, the evaporating water helps to keep me cool. I do find I have to suck back the water, and have a teaspoon or two of salt, after fighting. My biggest issue is preventing mould, especially in winter when it takes a while for thick garments to dry. I've attached some photos of my post training ritual of drying. I'm not allowed to use the clothesline, or dryer. Apparently my kit stinks.
Something against the GDFB gambies is that their smallest size, a Large, would suit someone 180cm tall, and who's eaten a few pies. You might notice in the photo that I've had the sides taken in, and sewn together two panels of quilting at the front (and back). Now it fits nicely, but I need a helper to take it on and off. I've also cut open the armpits, so I can lift my arms above my head. What I do like about the GDFB gambie is that it does a good job of absorbing hits. $240USD for the gambie, plus $80USD for the local saddlery to do the tailoring. That's $320USD. Gotta be cheaper for me to get a tailor made one from the Ukraine!
Let us know how you find ordering through Jolly Knight, and what you think of your kit when it arrives.