Wrong flange for replacment bariable speed pump

So I acquired a 270 Vgreen variable speed pump to replace a Sta Rite mpra6e-1471 Dana Glas single speed pump. But it turns out I have a round flange Vgreen and need a square. I’m unable to return the Vgreen for the right flange, so is there anything I could do to make it work. Would a round flange plate seal work or not sure if they make adaptors for this issue. Any help would be appreciated, thanks.

There isn’t a round flange plate available for the Dyna-Glas pump. You’d have to replace the entire pump in order to use the round flange V-green motor.