Length Mystery: 110 Straight-Through Centre Exhaust Pipe

The mild steel straight-through (no box) centre exhaust pipe on my 1997 300tdi 110 CSW rotted through so I ordered a stainless steel one from Paddocks (Prod. Code PM958), billed as a 8a-45 100TDI Replacement Pipe.

When it arrived it looked identical but having now taken off the old pipe and offering up the new one it was short. Thinking it was just a case that the back pipe had swung away, with a bit of effort I could just about marry them up but it didn't seem right. With the tape measure out, the new pipe is about 4cm shorter than the old.

Not sure what to do now as the part I ordered is for a 110. Searching around I can't see that there are different lengths of centre pipes for 110s. Would it be OK to force the pipes together but straining the rubbers or do I have a non-standard exhaust so need to replace the whole lot? Any ideas would be appreciated.

If the original exhaust has been messed about with why not order the next replacement section so the new silencer fits. Not a good idea to force the rubbers as everything will be under stress. Or, buy a non-std silencer section from an off the shelf supplier like Jetex https://jetex.co.uk/custom-exhaust-parts/products

Looking at the Paddocks site again, there are 2 -
1) Stainless Steel Utility Link Pipe - Def 110 - 300Tdi £41.89 Ex VAT PART NUMBER:DA4302
and
2) SS Silencer Replacement Pipe - Def 110 300TDI £43.98 Ex VAT PART NUMBER:PM958

I paid £41.89 + VAT so assume I ordered the 1st one but the receipt says
Product code PM958: Description 8A-45 110 300TDI SIL REPL PIPE DA4302 TF553

Does anyone know the difference between these 2 parts? Hopefully 1 is 4cm longer and I've ordered/been sent the wrong one.

(Paddocks is shut otherwise I'd just ring and ask them - nothing better to do this afternoon now so just wondering if anyone knows)