Interestingly the Scottish government have been trying to replace / modernise HIE for many years... However opposition parties have staunchly united to prevent it happening. So many questions : not least the cosy relationship HIE have with Natural Retreats. (Not just at Cairngorm but also John O Groats!)
MSPs vote to 'reverse' Highlands and Islands Enterprise plans
A reading of the Audit Scotland reports on HIE in general indicates how desirable subsuming HIE into a national enterprise body might have been.
Ref timescales, the main hope must be that limited repairs will suffice, otherwise due to issues of process, funding, technical and supply lead times (with EU Procurement Directives likely to still be applicable; which can't afford to be breached this time again) there's a realistic possibility of being without a regular solution for two or three seasons or more.
As mentioned above by another, this needs ScotGov intervention - write to our MSPs perhaps?