Technical Wiper arm seized on

[57mmStroke]

I must replace the O/s front wiper arm on my Multipla. It has been left on for far to long by the previous owner and has so much play in it it will surely fly off.
So must be replaced.
New one bought OE only (no pattern part) at close to 40GBP+Vat. (a bit dear after all this is not the Ferrari 612)
It has a taper fit and the old one is seized on. WD40 and plenty of tapping about did not do it. Any ideas before I get some pullers on it.
Yes the nut and washerhave been removed.
Your advice and experience will be much appreciated.
Extreme measures may also be considered, so don't hold back!

 

[Herts Hillhopper]

A common problem - and there's even a special tool for the job: see here for example... http://www.jthandtools.co.uk/toolspage1.htm (sixth item down, but its £25) I need to get the drivers arm off mine and haven't managed yet. May see if the local Autoglass team can help me, they have a depot nearby.

 

[57mmStroke]

Thanks
Got it with a puller.
I have pulled gears off easier then that one.

 

[T14086]

http://cgi.ebay.co.uk/DRAPER-WINDSC...ZWD1VQQ_trksidZp1638.m118.l1247QQcmdZViewItem

seen similar for £4.99 in local tool shops