There are a few specialists who can produce one-off water-slide transfers.
They cater mainly for the miniature model enthusiats (trains, model aircraft etc.), but they have the facilities to print good quality transfers.
I'm currently looking for a good supplier for my Toledo (see my post; Toledo Cycles London N18 - Anyone know anything about them?)
So far, I've found a couple of good printers, I'll let you know how I get on and what it costs.
The only problem you have is creating the artwork for them.
I took loads of close-up pictures of my transfers and used tracing paper to make a highly detailed copy, then scanned the tracing and made separations in Adobe Illustrator. -I've worked as a technical illustrator for many years, it comes in handy sometimes.
It looks like yours have a metallic gold back, which could be expensive, but if you want to go ahead I should be able to hook you up with a good printer soon.