Search Singapore HDB tile and Google comes up something else

My search for HDB bathroom/floor tiles ends up no where near what I was looking for (except for complaints about popped tiles; I guess the incident must have flooded the internet with tonnes of entry). Google failed to help probably because it was overwhelmed irrelevant data.

What I wanted to search for are:

1. What is the dimensions of floor/bathroom tiles available? I know that 30 x 30 square cm is common in Singapore, but are they common in HDB contractor list?
2. What is the average cost of per piece of tile? Surprisingly, there is no answer on the web. You will have to get a quote by contact. Sigh, having that information would have been helpful in budgeting.
3. Google failed to provide hits on any trading companies in Singapore that provided the products. 

What I currently know is that HDB contractors have their own set of tiles. But I don't know what dimensions are available. An HDB officer hinted that larger tiles are unavailable. I am not sure if 30 x 30 square cm tiles are considered "larger".

From www.renotalk.com discourse, I got to know about few traders that provided wall, bathroom, floor tiles. They are Harafy (reviewed in renotalk.com) and Lian Seng Hin Trading (note that LSH website is not informative, you will have to go to the showroom). Lian Seng Hin dot com much better selection of tiles (gallery pics) but without price.

Another good find is via Streetdirectory (search tiles dealer and hit 31 returns).



Addresses
Lian Seng Hin Trading Co (PTE) LTD
Address: 568A Balestier Road, Singapore 329885
Tel: +65-62522222 (6 lines)

HAFARY SHOWROOMS
@ EUNOS
Address: 105 Eunos Avenue 3, Singapore 409836
Tel: +65 62501368

@ BALESTIER
Address: 560 Balestier Rd, Singapore 329876
Tel: +65 62501369

@TRADE HUB 21
Address: 18 Boon Lay Way #01-132, Tradehub 21, Singapore 609966
Tel: +65 65706265

HAFARY  WAREHOUSE
@CHANGI
Address: 3 Changi North Street 1, Singapore 498824
Tel: +65 62858010

@DEFU
Address: 5A Defu Lane 8, Singapore 539310
Tel: +65 62835770

@SUNGEI KADUT
Address: 54/56 Sungei Kadut Loop, Singapore 729477
Tel: +65 63680889

@SUNGEI KADUT
Address: 18C Sungei Kadut Street 4, Singapore 729066