Hi, have a pair of aftermarket seats with attached rails to suit EF/EL/NF/NL. Bought them off a fellow member a while ago, but am too fat to fit into them comfortably. The seat base will suit a person of skinny to average build. The bolsters are pretty solid also so they will hold you in there pretty well.
Pickup from ashcroft, from Harrys cafe at orange grove rd on fridays.

Price $100