This company makes great bulkheads
http://www.landroverbulkhead.co.uk/our-bulkheads.html
Like the look of those, and the prices look good. I would be more comfortable with painted than galv, to be honest, because galv is quite difficult to paint properly.
...and the down side is - they currently have a FIVE MONTHS lead time
any one any experience of these guys?
https://www.pegasusbulkheads.com/