I would suggest looking into a shift or tilt-shift adapter, to mount say a wide-angle Canon EF or Nikon AF-S lens. This way, you have a much wider selection of regular lenses to choose from than just looking at tilt-shift only lenses. And you will likely be able to achieve what you want much cheaper as well.

• Edit: I specifically recommended full frame lenses as opposed to lenses made for crop-sensor bodies because they the full frame lenses (such as Canon EF and Nikon FX) are designed to project a larger image circle than lenses designed for crop-sensor cameras (such as the Canon EF-S and Nikon DX lenses). The larger image circles of EF/FX lenses allows for more shift than the image circles projected by EF-S/DX lenses when adapted to shorter flange-focal-distance cameras like MFT and Sony E-mount bodies.

Resources and suggestions:

• Various Kipon adapters to MFT body, with tilt-shift feature (adorama.com), $100-300 USD, depending on lens adapted, tilt-only vs tilt-shift.

• Fotodiox makes some shift-only adapters for various lens & combinations. Example: Nikon F lens shift adapter with aperture control (fotodiox.com), $100 USD.

Also, I am dealing with converting a full frame lens to a 4/3rds sensor, so there might be problems with that if a shift lens is being used.

Other than perhaps loss of sharpness near the edge of the image circle (depending on the lens), you shouldn't have any problems adapting full frame lenses to MFT. Your sensor is just going to use the middle 1/2 of the full frame lens's projected area (before shifting, of course). Really, the only problem you'll have, as it sounds like you've realized, is that due to the crop factor, you're going to need a fairly wide full frame lens so that its angle of view isn't too narrow when mounted on the MFT body.