HAHA! of course can find a supercharger for around £5k... look at link below:  
  
http://www.tdi-plc.com/catalog/index.ph ... _1114_1631 
  
  
Stage 5 upgrade: 
  
HKS Supercharger system £4995.00. Optional carbon cover £595.00. 
This direct bolt-on kit produces a 80+ Horsepower gain over stock (measured at the rear wheels), with boost set to 0.48bar (~7PSI).  
  
or  
  
HKS Special Turbo Kit for £4650.00 
Including GT3037 HKS Turbo, Exhaust manifold, Catalic convertor, Wastegate, Intercooler, Oil sump. 
Optional adaptor pipe for HKS Full Dual Muffler for £130.00