Reddit mentions of Camco 55353 50 AMP Female Replacement Receptacle

FYI: it's pretty easy to make adapters for something like this.

Buy one or more of these: www.amazon.com/gp/product/B00192QB9M (or something similar, there's many out there)

And for the plug pictured, you can get a cord like this: www.amazon.com/NEMA-6-20P-C13-Power-Cord/dp/B004WJNDR2

Cut the wrong end off the 6-20 cord and wire it to your 14-50 receptacle and bam, you got yourself an adapter.

It's very important, as mentioned by others, that you set your car to only charge at 16A if you do this, though, and never let anyone use your "adapter" for anything else, as most uses for such an adapter would not have the luxury of being able to dial down the amperage to be safe.

If you want an adapter to plug in to a dryer outlet, you can use something like this: www.amazon.com/Certified-Appliance-90-1010-3-Wire-4-Feet/dp/B00009W3P5 and wire it to the same receptacle, again making sure to set the charge amperage on your car properly. Note that there are two different common dryer receptacles out there and you want a cord that matches your need (or one of each?).

dont think an electrician will swap it out, 10-50R only has two hots and a neutral, while a 14-50R has 2 hots, neutral, and ground. The 10-50R uses the neutral as the grounded conductor, and has to be on its own circuit. The tesla plug does not use the neutral, so an adapter would work, but i dont think an electrician would be willing to install an adapter using the incorrect wiring configuration.


edit: if you dont want to pay 80$ for the adapter below, you can buy this:
https://www.amazon.com/dp/B00192QB9M/ref=sxr_rr_xsim1?pf_rd_t=301&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=2286650982&pf_rd_i=14-50r&pf_rd_r=Z7RA2WWBHK7RQHRHVA0V&pf_rd_s=desktop-rhs-carousels&ie=UTF8&qid=1469208482&sr=1

and this:

https://www.amazon.com/Pass-Seymour-3861CC5-30-Amp-250-volt/dp/B000BPFZHM/ref=sr_1_1?ie=UTF8&qid=1469208422&sr=8-1&keywords=10-50P

and pick up 1-2' of 6/3 wire from HD/Lowes for 3-5$. wire them together and you have an adapter. the outside two spades are your two hots (black/red) and the remaining is your neutral (white). you would put the neutral on the P to the ground on the R. do not hook up the ground to anything. there will be no neutral connection on the R.