I think the led6 is if you want a different price for your vac vs fragrance. The led6 can only have one price. As far as it fitting or mounting I'm not familiar with your vac.
Kleen Rite sells both the bracket and timer if you need them. You can buy either or both. LED6s is way more reliable and has a nicer screen. I stopped repairing the Colemans and using the 6s when the Colemans go bad.
Yeah modify the Coleman bracket thats there! Hammer out the two sides that are bent into the bracket and I believe you just flip it over. You can either zip tie the timer in or use good 3m double sided trim tape or both.