I've considered that too to get better tea at work, but for me the biggest blocker so far is that I'm so doubtful of some random chinese bags from ebay, considering how steeping in my view feels very adept process of extracting any harmful crap that the bags might have and this is something that very much would give repeated exposure. Am I just being too paranoid?
I don't use reusable tea bags, nor do I resteep. If simple paper/bamboo fiber bags are that bad, you'd be in trouble either way, since they're also used as spice bags for soups, curries, sauces, etc.