Don't waste your own money on this stuff - supply, and in turn your flight e, can get all this and more. The locker tends to fill up with the amenities toward the end of the FY when budgets are being spent out. If the training command is being stingy just be patient, it's in the fleet. And unless you are an exceptional axxwipe, there's no reason why they won't set you up. If you make it your whole fleet tour and they still can't find one for you it's probably a hint.
I'm not sure what fleet you're in Yoss, but I've been flying out here in the desert for 3 weeks without my own helmet. When I was back at homeguard I flew exactly once with my own helmet because it took the PR shop 3 months to get my stuff up, and even then it was only because I was getting ready to leave. Then they shipped it out here and who knows where it ended up. It took supply 4 weeks to get me flight boots. That was on a rush order since I was leaving. They sent us out here with Mechanic's boots. Zeta liners are completely out of the question. We can't even get any more visors so basically we fly everywhere visors up because you can't see through them anymore. By the way, that was all back at homeguard, not just on det. Don't get too comfortable with the idea that your fleet squadron will just throw stuff at you when you walk in. Everyone's hurting for money right now. Make nice to the supply and PR guys and you might, MIGHT, find some stuff, but be prepared not to.