We do the electrical work for a few places that you could try.
Guy Norris engineering, they mainly do new truck trays, tanks, bins, that sort of thing. Like TMC but smaller.
Bob Howden engineering, they do more repairs of large equipment and custom bespoke work.
Or the wife's uncle, Tennent engineering, they do mostly structural, and building work.
Don't know if any are looking for extra staff, but could be worth a try.
If it makes a difference, they are all on the south side of Christchurch, hornby / rolleston.