As
@Rich Stidger said, go with a local sign shop and it's probably cheaper.
If you like playing with computer graphics, lay out a single photo and do some placement and sizing. Exact measurements and position are done by reference to something in the photo. Here, the vertical distance between the two red stripes was used as a reference measurement. This is reduced size so is a little hazy.
Original vinyl lettering:
Computer cleaned up:
New "virtual" graphics in place:
Dimensions calculated by reference to red pin stripes:
In real life with no computer jiggery pokery:
The print shop wanted the .TTF file for the font.