What is your area? perhaps someone lives near you could give you a location to get them. Also, It is good to include that in your screen name so peeps don't have to ask.

I'm not sure on the coco chips, but pine bark fines are easier to find than you may think because there is not a product called PBF, It's more of a description. I get pine bark mulch (not nuggets!) or soil conditioner (which is PBF and "forrest" products, sometimes I skip the peat moss whan I use soil conditioner). Sphagnum moss and sphagnum peat moss are not the same thing. Sphagnum peat moss is a very finely ground product (in the US anyway)

Pumice will work, but it holds a little more water, as does coco peat. Be careful your soil is not soggy using all these highly water retentive ingredients, The whole idea is a free draining mix that does not retain too much water. IMHO, I feel coco chips, coco peat and pumice would be almost identical to peat based potting mix in water holding capacity.

oh, im from the philippines.

so if i were to use coco chips with pumice, how do i make the mix less water retentive? seems like i cant. (?)

is grit or crushed granite water retentive too? oh no

I agree pretty much with the above :-) But maybe some clarification of terminology would help. Peat is a very specialized ingredient..........it is a heterogeneous mixture of more or less decomposed plant material that has accumulated in a water-saturated environment and in the absence of oxygen.

So sphagnum peat is the decomposed remains of sphagnum moss that is harvested from bogs, dried and ground or milled. There is no such thing as coco "peat" - what they are calling coco peat is just coir or the fibers of coconut husks. No decomposition of this material has occurred in a wet, oxygen-lacking environment, therefore it cannot be peat. But these fibers are often ground to much the same consistency as peat moss, have a similar water holding capacity and they resist further decomposition in much the same manner and are often used in substitution for actual peat moss.

grit is basically non porous rock and does not retain water. Decomposed granite, pearlite or river gravel (freshwater) would probably be better than pumice.