If you are looking for reproduced speakers to your Buick, check with www.autoatlanta.com I bought a new frontspeaker to my 1965 Electra, it fitted right under the dash, it was tight against the radio but i got it in place after a while and the sound is great... The size is 10x4 inches... The good thing is that you dont need to build a frame to fasten it under the dashboard... I think that the speakers is reproduced for Rivieras but that they will fit other models as well... I paid 23$ for my frontspeaker, i won it on Ebay... I dont know their retail price but you might get the same price as me, call them and check it out... They also have rearspeakers... Great guys and fast shipping... Rgds Jannelu