Your insurance company (in country) should be able document the bike is a total loss. I would try to work through them even if it is a mechanical failure. A solution to this problem is to use a Bonded Warehouse and suspend the importation while you are out of the country. It is not cheap to do. In Costa Rica the cost seems to be about $5 per day. Once you have delivered the bike to the warehouse, you can take their form to customs and they will suspend the TVIP. Reverse the process when you return.