[Amazon has stuff like this](Philadelphia Flyers 3pc Baby Creeper Bodysuit Set (0-3 Months) https://www.amazon.com/dp/B0161X2X18/ref=cm_sw_r_cp_apa_0ufszbBFXC96J)

I searched "Philadelphia Flyers Infant"

Outside of that i would avoid ebay, I treat ebay clothes like I do flea market clothes. After you look past the lizard meat "chicken sandwich", you see all those kinda ok looking shirts that are probably filled with asbestos. Since its for a baby I would probably stick to Amazon and actual stores.