Take your spanner to a fabricator and they will step it to provide the offset, then get them to weld a new scaffold pole (mine is 6' ) and strengthening brace to it and sleeve it in padded rubber - I'll post a picture later.
2009 4/4 Sport Henrietta 1999 Indigo Blue +8 2009 4/4 Sport Green prev 1993 Con Green +8 prev