A community of 30,000 US Transcriptionist serving Medical Transcription Industry
I have no idea what the fees for a such a service are, though, so it may be cost-prohibitive, depending. But worth researching. (This is probably really more applicable for a small MTSO waiting for payment from docs first before paying their subcontractors than it is for a subcontractor hiring their own subcontractors, but I thought I'd just throw it out there anyway.)
An example of one here:
http://www.prnfunding.com/medical-transcription-factoring-testimonials
I'm currently IC'ing very part-time as a second, supplemental job, and they're going to pay me by PayPal, which is great by me. PayPal transfers into my bank account usually take 2-3 days at the most.