grillcraft question

So I just got my husband a grillcraft grill along with bp fabricating letters to go on it. The grill has a slight curve to it and the letters are straight, so it's a bit tricky to get them to stick. Has anyone else had this issue? Any suggestions are welcome. (06 Tacoma)

 

They are steel letters, right. Weld pins would be perfect but you would need to find someone willing to do it then probably redo the powder coating. High quality double sided tape is probably the best idea. But it would be super if you trIed a pair of rare earth magnets per letter then reported back with the results.