sink waste too low for appliance hose

Hi
I am adding in a dishawsher and just trying to plumb the waste hose into the adjacent sink waste
I got a sink + washing machine trap (like this: http://www.screwfix.com/prods/12794/Plumbing/Wastes-and-Traps/Sink-Washing-Machine-Trap-40mm) and all seemed straight forward BUT the soil pipe is now too high.
The original sink trap didnt have an outlet for the appliance, and the right angle to connect to the soil pipe is at the same level as the connection for the sink (like this http://www.screwfix.com/prods/10970/Plumbing/Wastes-and-Traps/Tubular-Swivel-P-Trap-40mm) - whereas the new one (and all the ones I can find) have the sink about 30-50mm higher. There isnt enough give in the pipes to use some elbow grease and get them in -= any ideas?
Can you get longer right angle connectors?
any other ideas?

How much waste pipe do you have to play with and is it possible to lower it to accomodate the deeper trap?

About 7cm of pipe from wall.
To move down means knocking hole in side of house, so rather avoid that if can!

Dont like em but you can get a self cutting waste connection that will fit onto existing pipe. http://www.screwfix.com/prods/42868/Plumbing/Washing-Machine-Accs/Washing-Machine-Drain-Out-Kit You should have enough room with 70mm of pipe. Only other option is knocking another hole through wall I think, without seeing the job.

Seen those, and yeah, didn't Luke look either!
Amazed can't just get a longer right angle.
Guess cutter has to be better than hole in wall though, unless anyone else has any bright ideas?
Thanks foe the advice, much appreciated