Embroidery on open toe slippers

I have been asked to embroider open toe slippers. Has anyone done this? I have the PR600 & even with the slim fast frames, the slippers won't go over the arm. Is there a speceal way or nack of doing it? This order could be 250 slippers each time, so am hoping there is way before I have to decline. Would appreciate any feed back on this. Thanks
mino

In case anyone else is interested, I've been given this site who do open toe slippers with velcro side closure which is ideal for embroidry:- sewphisticatedstitcher.com
Unfortunately, it's no good for me as they are in USA whereas I'm in UK. I needed 250 pairs and although they gave me a good price, the shipping would have been $600. For some reason or other, UK don't have these type of slippers. Might be of interested to those of you who are in USA though.
mino