I actually made some Rupee models a long time ago. They're not formatted correctly for Blockland, but someone could have them if they want them. They're pathetically easy to make, though.
I'm not very good with modelling, so my models aren't at all advanced, but I was just screwing around with Blender to make this token:

Note: Before people go screaming that it's too high-poly for Blockland, it was actually made for a render for an upcoming Community Projects thread. I might try making a BL-styled one, though.