At the time of writing, tattered copies of these 2 EPs (along with an admittedly sought after single from 'Apradh') are up for grabs on eBay. Starting bid? A measly US$320.
Call me funny, but I find that kind of ridiculous. Therefore:
2 MEGA RARE RAHUL DEV BURMAN SOUNDTRACKS!
8 PRE-RECORDED SONGS VALUED AT US$32 (MIN.) EACH!
FREE FOR THE TAKING!!
And take them you should, as both 'Raton Ka Raja' and 'Ehsan' are excellent, and as the latter includes the coolest version of 'Pata Pata' ever made.
Track listing, Raton Ka Raja:
1. Mohd. Rafi & Asha Bhosle: Door Se Tera Diwana
2. Asha Bhosle: Ae Dekho Yahan To Zara
3. Mohd. Rafi: Raton Ka Raja Hoon Main
4. Lata Mangeshkar: Jhanak Jhan Ghungroo
Track listing, Ehsan:
1. Kishore Kumar & Asha Bhosle: Aaja Tujhe Pyar Kar Loon
2. Asha Bhosle & Chorus: Yeh Jhalak Yeh Jhalak
3. Lata Mangeshkar: Pyasa Mera Dil
4. Asha Bhosle & Mohd. Rafi: Aaj Tere Nainan
I paid around US$10-15 each for mine incidentally, on eBay.