43 Stingray (aeromarine)
43 challenger mono?? (aeromarine)
41 sprintcat or 36 sprintcat (aeromarine)
45 cyclone cat (aeromarine)
Would have a better idea if you have an overall length of each hull. They all look like aeromarine collection. No too certain about the 2nd pic mono
Happens to me as well. The guys in Vietnam sent me alloy springs and I cut them to desired length then turn a hook at the end with pliers. Have not broken any springs since. Different length spacers require different length springs. So far so good for me.
I think he went out of business well over 20 yrs ago. Measure the cowling or hatch coaming area and we can see if any Aeromarine hull hatches have the same dimension. Might just get lucky.
Or a Stryker F41 hatch just might be a direct fit or little modifications.