I have a pair of March MDX-MT3 pumps for sale that we aren't using any more.
Max of 8 gpm and 16' of lift make these a nice upgrade from the 809 and are similar to the 815 flow/pressure. Pressure rated to 200*, but never had any issue whirlpooling right after flame out.
1/2" threaded on in and out.
No plug as I had these hardwired through a switch but can throw one on if you need it.
$120 each plus shipping which should be $10-$15 max
Any questions please let me know.