They don't need to be the same brand, IMO. Mine has a Toshiba branded HD ribbon, and came with a Toshiba drive, but I replaced it with a Samsung. I have read somewhere where someone did in fact sand down the back of the ribbon so they'd be able to fit it in. I don't exactly recommend this for a novice, do it at your own risk. The ribbon cable is potentially difficult (and expensive) to find.
See this post:
Motion Computing LE1700 [SXGA+ View Anywhere LCD (LTD121KM2M)|Core2Duo 1.5GHz, Samsung HS08XJC 80GB 5400rpm]
Elitegroup S20II [WXGA, Core2Duo 1.86GHz, WD5000BEVT]
Samsung Q1U/P [Core Solo 1.3GHz, Samsung HS08XJC 80GB 5400rpm]