Venturi Powerhead

[AnchormanSD]

Need help finding replacement Venturi pump.

I worked in the late 90’s at CPR Aquatic (Creative Plastic Research), maker of some of the original (maybe THE original) hang on the back of the tank protein skimmers (called the bak pak). It was a cool place and everything was hand made; skimmers, quarantine tanks, etc each made by one guy.
Anyway, I’ve owned their approx 12 gallon MRT (micro reef tank) with a built in skimmer box which was designed to operate with a Rio 600 RVT Venturi powerhead. I’ve had 3 of these Powerheads over the years. 2 have seized and I’m down to only 1.
I have live rock arriving in a few weeks and want to get a backup/replacement pump for when this one eventually dies. This whole set up is nearly 30-yrs old and the Rio powerhead (with Venturi) seems to be discontinued. Anyone have recommendations for a replacement pump? The nozzle has to fit in the skimmer chamber hole so I feel like my options are limited. Throwing a few images if this helps clarify what I’m working with and looking to replace.

 

[00W]

Need help finding replacement Venturi pump.

I worked in the late 90’s at CPR Aquatic (Creative Plastic Research), maker of some of the original (maybe THE original) hang on the back of the tank protein skimmers (called the bak pak). It was a cool place and everything was hand made; skimmers, quarantine tanks, etc each made by one guy.
Anyway, I’ve owned their approx 12 gallon MRT (micro reef tank) with a built in skimmer box which was designed to operate with a Rio 600 RVT Venturi powerhead. I’ve had 3 of these Powerheads over the years. 2 have seized and I’m down to only 1.
I have live rock arriving in a few weeks and want to get a backup/replacement pump for when this one eventually dies. This whole set up is nearly 30-yrs old and the Rio powerhead (with Venturi) seems to be discontinued. Anyone have recommendations for a replacement pump? The nozzle has to fit in the skimmer chamber hole so I feel like my options are limited. Throwing a few images if this helps clarify what I’m working with and looking to replace.

Saw a few cycling around ebay a few days ago.
The aquaclear powerheads might work.
Sicce makes skimmer pumps, some with the venturi adapter, some without but they have threaded outputs which take pvc fittings.
Best I got good luck!