Prime Repaint

I'm doing a redo on an 07 leader class Optimus Prime but hit a snag. His exhaust pipes came off. Is there anything you guys would reccomend to replace them. I already tried Dum Dum sticks and they didn't stick. 

SEIBERTRON - Your Planet For Everything Transformers
https://www.seibertron.com/energonpub/
https://www.seibertron.com/energonpub/viewtopic.php?f=143&t=80643
Aladar wrote:Not on theleader class. The voyager has those. I have Nightwatch Optimus, which was only legends and leader.
Aladar wrote:Do they still sell ROTF leader Primes in stores or just DOTM?