Non Paypal donations widget/plug-in/script?

I’ve been searching for a way to accept donations via my existing authorize.net account… or my google checkout account.

All of what I see works with paypal, one particular plug-in I tried claims to have what I need but doesn’t seem to work or have a very helpful team (no names mentioned). Maybe down the road it will work but I need something now.

Does anyone have a good solution to recommend?

G