One seller from Ebay sell seeds of Fingers. I can buy them but it is very interesting to know how many years it needs for blooming?

Yes, I grew mine from seed. It took 5 years to start blooming. One bit of information though, they do not produce true to color.

I bought 10 Red Finger Lime (Citrus australasica var. sanguinea) from the ebay seller in Australia. 6 sprouted and are growing fine. Interestingly I thought the first few sprouts were mouldy because they weren't green, they were an unhealthy looking reddish colour - turns out all the sprouts were like this, then when they got bigger they turned normal green. Also, it took them a while to germinate, about a month. I'll let you all know in 5 years time if they have fruited or not, and whether they are red or not