Ordered mine today from Premium Aquatics, along with a replacement OTP 2000.
I wish there were a different pump that would work on the 300, this is the third pump I have had to replace in two years. The first was a comp replacement from the guy I bought the skimmer from.
Tried mesh modding these pumps, never got it to work well. If power went out or turned them off would have too almost pull the pumps apart to get them all restarted.