The inlet on my 300200 pre-filter is warped. New o-rings don't help much until the assembly warms up. Priming introduces air into the chamber. So.... what are my options? <br/><br/>My attempts of finding a 300200 in stock are coming up short. Apparently, there is a shortage nationwide. My other option is to change the whole thing out to a 790R30. This also may be in short...