Organ bass pedals

[raffertisation]

Hi, I'm new here and hope you guys won't mind that I came here to ask some advice. I'm not not an organ player so please forgive my ignorance. I'm wanting to purchase just a set of organ bass pedals and play them through an amp. I have no idea if a unit like this exists and figured this would be the place to ask. I'm guessing that there might be a midi device and a decent sound module that would do what I want to do?

Basically, I want to play bass with my feet as I play the guitar. Especially interested in vintage pieces, though my budget points towards midi...

Any thoughts?

Thanks in advance.