You can buy episodes or seasons on Amazon prime, VUDU, or Apple TV+. But it would be far cheaper to pick up the complete series on DVD and get a good upscaling Blu-ray player that will convert the SD format to HD.
Jesse: Okay. . .I'll let you sometime when Boss ain't there. . .don't think he needs to hear. . .besides Lulu will take care of him (and you know what i thought? "Forget your high society I'm soakin it in Kerosene")