Orient Express - Cheap Chinese Rims / Wheels / Forks / Frames / Cranks / Etc

@danslecarton Probably, or any similar wholesale Far East site.
The customs fees you might incur are likely to be less than those you've calculated (incl. VAT etc...), because the seller will probably 'undervalue' the items on the shipping slip (they all seem to do this without a buyer asking).
However, Parcel Force will smell a rat when inspecting the package, and likely charge more VAT than they should (for the marked value of the package), based on what they believe the package is actually worth. This usually falls somewhere between what you should owe (based on what you paid), and what you would owe if Parcel Force believed the seller's marked value.
Example:

• 88x23mm carbon tub rim I ordered in 11/11 sale. Price paid: GBP91.00

• Seller's marked value on package shipping slip: USD48.00 (approx. GBP40.00)

• VAT should have paid: (20% of GBP91.o0) GBP18.20

• VAT would have paid if PF believed seller's marked value: (20% of GBP40.00) GBP8.00

• Total should have paid (not incl. PF handing fee): (GBP91.00 + 18.20) GBP109.20

• Total would have paid (not incl. PF handling fee): (GBP91.00 + 8.00) GBP99.00

• Total import fees actually paid (incl. PF handing fee): GBP21.00

• Import fees minus PF handling fee of GBP8.00: GBP13.00

• Calculated amount Parcel Force determined the package was actually worth: (20% VAT GBP13.00 x5) GBP65.00

• Total amount paid all-in: GBP112.00

• Total minus PF handing fee: GBP104.00