I would say ditto on the stove support, I am sure it is available through a Jayco dealer, but it would be less expensive to make your own.
I do know the awning poles can be purchased through Jayco, but they are kinda pricey for what they are. I'd either try to make your own, or get a different awning. We actually had our awning flip completely over the roof of our Jay Series 1207, didn't hurt the fabric at all but about half the poles were bent. After finding out the cost of the poles, we ended up getting an "aftermarket" awning, it was much easier to set up and didn't cost much more than replacing the poles.
2013 Starcraft Travel Star 229TB
2011 Jayco X17Z(traded in)
2010 Jayco Jay Series 1207(traded for the 17Z)
2011 Chevrolet Silverado 2500HD Z71 CC 6.0L/3.73
Reese "Pro Series" 800lb Trunnion WDH w/sway control