Where in Miami can we rent buggy wheels for our car seat?

[Jazzy4545]

Any ideas where we can rent some wheels to attach the car seat in when we take a taxi around Miami. We don't want to take the bugaboo wheels for car seat as they're too heavy. We're taking a lightweight Maclaren for walks and for time on the cruise. We know we need to take our own Maxi Cosi pebble car seat for our 6 month old but realised we will need wheels for it when we go somewhere in a cab! Like the mall or sightseeing etc. any advice on how to manage this is welcome. We're going mid October 2013 xx

This company may be able to help although I have never used them:-
www.babytravelcompany.com/home.html

Taxis seem to congregate around the major hotels and outside the Bayside Mall.