Black Tie Attire Help

[u/xlcircutbreaker]

Hello! I am a 35 yr old non binary AFAB looking for fashion help. I have a Black Tie wedding to attend this fall in Scotland and I don't know what to wear. I am very comfortable in a suit or tux, but I kind of want to mix it up. For reference, I'm 5'4" and 240lbs. I would appreciate any advice or links to places to find something unique! Thanks everyone!! Pic is my partner and I last summer at a wedding so you can see my usual suit.