Phono preamp Q re: Technics SL-1900 turntable

Ok, a buddy of mine has the above turntable with an Audio Technica 22780E cartridge. I think it is pretty basic turntable.
He just bought a new DTS receiver and it does not have a Phono input. He is bummed.
I told him he probably needed a separate phono preamp that would go between his turntable and his AUX input on the receiver.

I have no idea what to look for new or used. He is not a high end audio guy-just wants something that will get his turntable to work decently with his receiver.

Any advice on specific products to look for is welcome. I am a digital guy and just want to steer him in the right direction.

Thanks!