Probably won't be able to get the coil as stated above.
Marine LP Gas Solenoid Valve Kit - Trident Propane | Fisheries Supply
Xintex SV1 | Fisheries Supply
There is another thread around about the use of high and low pressure valves. Make sure if you are using directly off the bottle before the regulator
its a high pressure valve, the secound link. The parker coil you pictured if fitted to the valve repackaged by Trident is a low pressure valve and needs to be after the regulator
. Also should note for a stem type solenoid valve like you are using its extremely important that the surface is clean between the stem and coil. If the surfaces gets fouled or coil is not properly seated it will overheat.