I would buy this.
http://www.volvopartswebstore.com/products/Volvo/1997/85025l-5-cylinder-Fuel-Injected5DRS-WO-SR/Clutch-kit/1128079/272237.html
and this
http://www.volvopartswebstore.com/products/Volvo/1997/85025l-5-cylinder-Fuel-Injected5DRS-WO-SR/Release-bearing/1184571/9181780.html
http://www.volvopartswebstore.com have excellent pricing, they are all new genuine parts, shipping costs are low and you will have it in pretty good time. I doubt you will get it any cheaper.
Although I am confident this is the right one, you should send them an email with your VIN to confirm that it is correct.