One Stop Trekking
The One Stop Trekking Shop is one of the best place to find high quality trekking gear at reasonable prices in Pokhara lakeside. From trekking boots or shoes to down sleeping bags, gore tex and fleece layers to keep you warm they stock it all. The owner can arrange trekking for you as well, as he is very knowledgeable about high altitude trekking in the Annapurna's.
Water purification drops are available here that are completely tasteless. One bottle will make about 100 liter of clean drink water, very useful when trekking. Flash light and sunglasses are also essential items, you can find high efficiency l-ion batteries and 1000 lumen bulbs to keep you safe at night.