Working with Platinum?

Hi,

We're a small jewellers who only take on-line orders and everything is
made by hand to order.


We've had an enquiry through for one of our items made in platinum.
Now, we only work with silver/gold and semi-precious stones at the
moment and have no experience working in Platinum.

The item in question is:
http://www.pennyserenade.com/Cufflin...ilver//63.html

It's a simple item, that needs just cutting from sheet and has a single
solder join that is easy conceal...

I've a few questions I'd like some expert help with before I can
respond to the enquiry.

1) Having never worked in Platinum - is it similar to silver or gold?
and are there any pitfalls we should be aware of?

2) Where are good suppliers of sheet Platinum in thicknesses of between
1 and 1.5mm

3) What would be a suitable markup on an item like this made in
platinum?

4) If it really is too difficult and you'd advise against us having a
go - could anyone with experience help out and make this on our behalf?
(Paid accordingly of course!)

Kind regards and thanks in advance!

Mal