Clayton, here is the exchange I had by email with Zhang Fu Ming (firstname.lastname@example.org) at Shen. N.b. payment was made by wire, they couldn't accept credit cards or paypal. There was a delay of a few weeks because my bank couldn't figure out how to write the name of the Chinese bank or the recipient's name.... even though I had the swift code etc! So, despite modern banking technology, it all came down to how to write the name of the bank or the company on some form there in China, so there was some nutty delay. But it worked out in the end, it just took some patience. Anyway the person at Shen was wonderful, see below.
As you see, my initial email (in bold) was a very simple inquiry.
Thank you for compliment!
A 5x8 reducing back for 410 will cost 180 USD.
----- Original Message -----
From: Keith A. Williams <email@example.com>
Subject: 5x8 back for Shen Hao 4x10
Date: 09-03-14 02:16:26
Can you sell me a 5x8 back for my Shen-Hao 4x10 camera? I
already have a 5x7 back (I like it!), and was considering
modifying that to 5x8, but if they could make one then I'd buy
it happily at a reasonable price.
The shipping cost is 36 USD by EMS;
The bag bellow of 410 is 150 USD;
And the 5x8 reducing back for 410 is 180 USD.
The total amount will be 366 USD.
We have got your payment, your orders will be shipped to you in 3 days.