Bushings

Anyone know a company who sell metal bushings? Got a hole in a wheel that's too big for th axle.

Also, where does one purchase steering assemblies like the one below. I've been googling for awhile and trawling usual places but to no avail.....
I've found them outside the UK but none here.



Thanks

David - Just bring the bits over next week - I'll bush the wheel and make the steering arm.