The store is not visible from that last intersection, but a sign with "DIY" is, I believe.
Directions: Take Minquan E. Rd. eastward, cross Fuyuan St., which is the last street just before the bridge upramp; veer right and take the small low road eastward alongside and lower than the bridge instead of the bridge onramp. There's a Buddhist supply shop there, then a tire shop; just past that, at the first alley, turn right, go 100 meters or so, and it's on your left. 義興西點原料行 is the shop name; the address is 富錦街574巷2號 Fujin St. (Lane 574, #2). Phone 2760-8115.