The ramp on my Transporter was damaged at the entrance on both sides. At present no-one makes replacement ramps for this game.
I spoke to Cliffy and he told me that one of his customers had used an Iron Man right side protector for the Transporter right side, but he had nothing for the left side. So I bought the Iron Man one and this worked fine.
I happened to have a spare Funhouse left side protector and I found that after gently bending this by hand, it was a near perfect fit. It needed a tiny amount of filing (less than 1mm) off the upper front corner, then it was a perfect fit.
I sent my findings to Cliffy along with these pics so he should be able to sort you out if you want to buy these.
Pics below
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