

3,114,782
amazon. Just did a quick check and found dozens, some said universal, gave measurements.
1,457,102
If it's the tank lid, try calling the manufacturer or checking their website.
1,157,585
You can Google it, Bing it or Yahoo! it. Alternatively, Home Depot, Lowes or another place might have what you are looking for.
5,967,651
Try a habitat for humanity store, they get lots of used construction stuff.
2,707,460
Those are tough to come by...online searches will be your best bet. If you know the manufacturer, their website might have the lid. But it seems you are often stuck with having to buy a whole new unit
3,987,776
Not sure what part you are looking for when you say toilet lid back. Are you talking about the tank lid? My experience with them is that you will have to replace the whole tank but you can salvage the the bowl. Check online.
212,705
I'd say Lowes.com, Amazon or just Google it. I am sure Lowes or Home Depot will ship it to you or your local store.
1,573,320
That's really odd that you can't find a good size. I would call a plumber and ask?
1,770,026
I would go direct to the manufacturer online or Google the part or model # and see what comes up. Good luck!
3,986,056
470,887
1,985,542
477,609
As crazy as it sounds you might try ebay or somewhere online. If all else fails replace the toilet.
1,204,724
4,799,925