Router & Jig for worktop

I have a laminate kitchen worktop I need to fit, so I've obtained a Silverline half inch router 675059 and a jig.

However, I seem to be missing a guide bush. Does anyone know of it's possible to get a guide bush to fit this thing?

I also have no instructions with the jig!

Actually, the worktop is a SALJAN IKEA custom made worktop - it has square edges, so I'm not sure what sort of joins are appropriate... we need to make 2 x L joins

Actually, I found this video which I think will work better for joining these square edge worktops:


I still think I need a guide bush to make the joining bolts... although it's not crucial to get a fine finish on that.

I will need to cut a bit off the lengths, but I have a circular saw for that... might have a couple of practise cuts first!