Just replacing a lift pump in a TDI and found the replacement one from OEM was 3mm too long (60mm vs 57mm). As a result the only way to fit the pump was to have tension on the lever from the start thus limiting its action.
I suspect the finger primer effectiveness would also be impacted as it operates through the bottom half of the lever's action.
Trying to bend the thing would not be a good idea even with heat but I'm hoping the spacer would fix the issue.
Am now looking to machine up a spacer as getting one of these from the UK to OZ is over 2 weeks lead time, but if they had been readily available I would have jumped in for sure..