I don't have data sheet on the BEL187 transistor but you can replace it with 2N2222, ZTX450, or if you want a little bit more then use BD135,137 or 139 ..
Hi, See the attachment for the BEL187 datasheet. I got it from www.bel-india.com. The pdf file name is Small Signal Transistors (in the website) of 11MB...! So, i just took the 3 pages required. Bye, PRAVARDHAN MOD: Do not upload any material which is freely available on the net. Just give the link. Next time you'll get a warning.