...without a way to change the post-pump filter, you're mostly wasting your time changing socks or screens.... ask me how I know. The only real solution is regular maintenance of the post pump filter in addition to changing the sock/pre-filter. You either have to buy a whole new housing or switch to some sort of serviceable filter set-up.
The good news is: unless you're running nitrous, a turbo, or land speed racing it probably won't kill your motor when it goes bad, it'll just run like crap.
Attack life... it's going to kill you anyway.