Try another dealer.
I did my cam belt about a year ago and the prices/part numbers were as below from the main VW dealership:
6 off Crankshaft vibration damper pulley bolts 911 439 01 £0.48 each
2 off Engine mount bolts (joins two pieces) 105 524 02 £2.87 each
1 off Fixed mount to bulkhead 905 969 06 £4.87 each
1 off Fixed mount to bulkhead 910 296 02 £4.70 each
2 off small engine mount bracket 019 502 13 £0.58 each