Does anyone know of any shops like these in Chiang Mai? I'm specifically look to buy a hot glue gun.

Try Global House or Home Mall.

There are hundreds of hardware stores around the city, many are a right downright dirty aladdins caves.

start your search around the moat...all along Chang Puak stretch towards the bbq on the corner; there is a good selection down Chang moi and Sri Donchai and again going back on the chang mai gate side.

As for Global/Home pro; i have to say i have a pretty good knowledge of what they sell there and i have never seen anything looking like a glue gun, but then again if it was sold in the curtains/embroidery aisles then i would have missed it.

just maybe you will find a glue gun in one of the stationary shops, as they sell all manner of crafty stuff for the students.

Chiang Mai Plastics in Warrorot Market has many different styles.

Home Pro, at Big C Extra ( was Carrefour)

It would be difficult to drive down almost any street in Chiang Mai, outside of the old town/moat without seeing a hardware store, they are everywhere - easiest one would be Home Pro at Big C on the ring road, east of the river.

The art shop next to the U.N. Irish pub has many.