Frank, you have our sympathy. A few years ago our nearly new RiB
got pinched off the stern of our moored boat in Hobart, Tasmania. When you live at anchor
all the time it is a devastating blow to loose the means of getting ashore. In our case the perps drove it 15 miles up the Derwent, took the 12 year old Suzuki 15 off it and then poured petrol into the hull
and fired it. We eventually got back a scorched aluminium hull
and some charred rubber bits. Depressing.
At any rate, we wish you the best of luck in recovery.