bluetooth for e90 323 with iDrive

[eNerGy]

Hi All,
Need some advice on bluetooth module for e90 with iDrive.
PML quoted SGD 2180 for bluetooth module (with installation) for e90 323 with iDrive.
It's a bit expensive.
Search the web and found this link from BMW 3 Series 2006-2008 E90 - Bimmernav.com Online Store
http://www.bimmernav.com
Should i get it and install it locally?
Anyone with dealt with bimmernav before.
Please advice.

thanks and regards,

energy