It will be expensive. No doubt using the appropriate aftermarket hoses will save a lot of USD. I believe the official kit in the UK is getting on for £1000.
We ended up buying generic fuel hose (not injector hose), vacuum hose etc, and bought the Rotax specific parts from CPS. I'd expect there's somewhere closer to you You'll (probably) also want the engine mounts, and we got those from the manufacturer (Greg Gremminger at Magni, in this case).