They also use to build in batches. Batch of Custom24’s, a batch of DGT’s, a batch of 594’s, etc.Four months is not bad at all. They've had much longer waits in the past. The thing to keep in mind is, they build to order rather than manufacturing ahead of time trying to predict demand.
Thomann could have known in advance, but they didn't care enough about you to do anything about it.
The thing is I can´t find a better deal for a frost / rosewood in EuropeThat's about it. I don't understand buyers' willingness to stay with an order that is stringing them along when the guitar they want is in stock elsewhere. Guitar dealers do understand that tendency, though, and I suspect they abuse it.