I am not into SVR but I saw reasonable quality ones at the following LFS.

1. Samgoldfish - LCK Lane 9
2. Clementi 328 - Clementi Ave 2
3. Rainbow Aquarium - Serangoon North Ave 2
4. Qi Kim Hu Aquarium - Woodlands Ave 1
5. Aquatic Connection - Blk 53, Sims Place
6. Fins Palace - Farm Mart
7. Qian Hu - Jln Lekar