hp 4200/4250/4350 printer with 75 sheet envelope feeder alternative

I am looking for a desktop laser printer model whether it be hp or otherwise that has comparable speed to the hp printers with the 75 sheet envelope feeder.

customer has lots of envelopes to print

black and white and color alternatives...

any suggestions would be helpful...

if there are dedicated envelope printers... feel free to suggest models...

thanks...