I really couldnt find a whole lots of options on what else can be done to the number 3 injector to fix potential heat soak issues.

I was wondering besides the dealer fix, what are some other options? heat tape?

Also does someone have the part number to the dealer fix for this issue? My local dodge dealer couldnt find the TSB for it...so they said.

Get some of that header wrap stuff. You can use it on the exhaust and on the injectors/fuel rails. Ditch the under hood insulation and install hood vents. Make sure that your mechanical fan and fan clutch are in good working order.