Having a quick cast about on eBay I found this lasered product - which I am trying for lineside fencing along with two others. It is stronger than it looks [and the other two] and can bend a little if you need to enclose a gentle bend, as can the others. Because of the base section there is no need to drill holes in the baseboard. R-
£9.95 for 8 x 300mm sections. Seller is torri_laser.

The fencing as it comes to you.

Fencing unassembled - close-up.

Assembled - push fit.
As with most model fencing products there is the troublesome gap / double upright issue to contend with. I just cut one sides upright off [red line] and butt them together.
Young at heart. Slightly older in other parts.