With a few friends we were interested to organise a training group as well,
You can also contact Jade, she is the one who introduced us to freediving: http://freedivesingapore.com/
Is it possible to do cross country, in either the The Turf Club, BTSC or the Polo Club?
Is it possible from their facilities to go for casual rides in the forest/park?
Try the frame shop on Kerbau rd, in a shophouse in the walking part of the street neer the corner of Belilios Lane.
They are very professional and very reasonably priced.