You mean the exact thing I just gave away with the aquarium I sold?
(it was even the original VCA one)
Can't remember how big your new aquarium is and unsure of the return pump power but I found the RFG blew gravel everywhere so had to ditch it. I'd have an experiment with the depth below the water you use it also if you can before you drill, there is a minimum amount they suggest before it starts sucking air in from the surface through the venturi/eductor action and a parameters for the flow rate to fall within for it to work properly.
I'm unsure whether these work to the exact same tolerances as the VCA ones, I believe someone 3D scanned the original, made a few minor adjustments and now people just print them from a free download you can/could get.