Or you could always make up your own. I got fed up with that tagboard pretty quickly because you have to bend the components out of shape to get them through the holes and they ended up looking untidy. Plus that central gap isn't very big so you are still very much restricted in components you can use without having to bend them over the top to make them fit.
My preferred method now is to use strips of walnut from a furniture repair shop on eBay and 4mm brass eyelets. I bought 10 strips of walnut around 600mm x 60mm and 500 brass eyelets for around £20 in total and that would be enough to make anything between 80 and 100 boards (obviously depending on the size of the circuit, and I would need another pack of eyelets).
You can bend the component leads 90 degrees and just stuff them all in the holes and cover in solder without having to bend anything out of shape to get things in. It really is a joy compared to that tagboard.
Or another alternative is perfboard with vero pins to make little mini turrets to wrap the components round. Not as simple to do as the eyelets but still better than tagboard for me. Here's a pic of a couple of made up perf/vero pin boards.