Another shout out here for TMM. I had a charter a while back where we needed the chase boat a couple of times, they co-ordinated closely with us and met us the same or next day. We weren't really dead in the water and it also really helps if you can get to Tortola or VG to get the work done.
One of the guys arrived after spending the day at Deadman's on Peter island up the mast untangling a halyard in 25 knots of Xmas wind - not the best anchorage in those sea and swell conditions. Buddy was a trooper about it, but he got fairly beat up swinging around in the rig, so I did a filter change for him to give him a break.