They certainly charge top dollar! The required part is difficult to obtain in Europe, simply because it is rarely used in this way. That is why it is often solved the way you have done it in the past. However, the part is easy to obtain in the USA, and below you can see what it costs there in USD.
Perhaps unnecessarily, below are 6 BLUM suggestions.
Furthermore, it was noted that filling with a piece of wood is much stronger than the BLUM solution.
