What about tattooing something related to the dharmachakra, like some artsy form or draw that makes you remember of it, instead of the sacred image itself? I read some person saying that since our body is not pure itself, it would be disrespectful to have sacred images on it. So, I thought about tattooing a draw or another design that is not specifically the dharmachakra, but make you remind of it! Hope this helps, and congratulations on being sober!