GM# 9195055 (Opel KAT 05-42-801) are the pad retaining pins for vented discs and are 86mm long. Pins for solid discs are 74mm.
GM# 9195056 (Opel KAT 05-42-913) are the anti-rattle cross springs for vented discs and are 56mm across the horizontal span. Solid disc cross springs are 48mm across the horizontal span. And that's because although the pads are the same the vented disc is 20mm thick vs 12mm for the solid.
There is no, and never was, any GM fitting kit for vented discs that included these pins and springs. Only the individual parts.
Likewise there are no 3rd party aftermarket fitting kits for vented discs. The ones advertised are all incorrect. They're for solid rear disc Omega Bs or they're Vectra/Calibra/Carlton/Omega A parts.
You need to find a Vauxhall dealer with a parts department who can place a special order in Germany. Payment upfront, no returns unless faulty and will take about a week, if the pins and springs are still available. Don't expect much change out of £50.
Your existing pins might clean up and be reusable. The cross springs usually corrode at the brass rivet and fall apart.