Michael,
The retrofit costs $40 plus shipping charges. I also looked at the 4-in1 gauge it looks cool. I liked better the the speedo that has another gauge inside. I like the layout in it.
You are more than welcome to drop by during your visit. What part of PR will you be visiting? I'm located at the south west corner of the island. PM me when the date comes I will send you my contact info and address.