.... and don't forget Ace and other hardware stores. I'm often amazed by what they have in there.
I have no clue how special the knobs and valves are on your Pinnacle. It might turn out they can be found in many places. Good luck!
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.