Speaker mod companies?

I have been auditioning a lot of bookshelf speakers as of late and afterwards have come to the conclusion that my current speakers ( Art Skibo) are giving me around 85% of the satisfaction I desire - I like the look and size. So, instead of moving on why not just tweak the crossovers and internal wiring.
Anyone recommend a good company to start with? I'm not too much of a DIY guy so I would prefer someone else to do the labour. p.s. I am in Vancouver,Canada - so Canadian firms are a bonus to me.