AgreedSoundwave is my fav Decepticon. I have a Soundwave t-shirt that I bought a while back from JayJays but I don't wear it all the much. It's the MISB collector coming out in me
Unfortunately, there hasn't been a Prowl t-shirt (that I have found anyway) made. My wife is an expert at design and printing so she made one for me which I wore at the last Parra Fair.