If it is HMBWA under that IC then there is a trusted supplier that I know where you can buy it.
Check this link https://www.zeusbtc.com/ASIC-Miner-Repair/Parts-Tools-Details.asp?ID=1223
You can also try to ask them if that IC is what exactly you looking for.
It's exactly that one, but they don't want to give the specs. There are tons of these boosters sold by suppliers like Mouser, Farnell, Digikey, but we need to know the exact specs so we can order the right one. ZEUS is selling the garbage ones from China for 5 times the price... I refuse to buy my electronic parts from Chinese suppliers as they take advantage of these parts being used for mining and pump up the prices x10... So not only me, but a whole group of antminer repair guys are looking for the exact specs of this part lol.
Hence the link you sent, those bastards didn't mention a single spec