Mfgr's name and model # off the I. D. Plate of your mower ?

There should be a number in the format-
917.xxxxxx or 536.xxxxxx or similar.

Then go to-
searspartsdirect.com

Bluejacket - Mr. Kapaun failed to inform you the most likely that I.D. Plate will be found in the cavity under the tilting seat of your mower...

You obviously failed to inform him first!

Well, you see, Mr. Kapaun - by your standards I would be expected to make such an error. You, on the other hand...tsk, tsk.

Jeffery, when you stated that you have been looking all over for these.............has your search included taking one of the old bushings to a "bearing distributor" ( bearing supplier/jobber)?
Often times items like these are common shelf items when you go to a big bearing house even though they are rarely found in other venues.
Even if the size you need is not in stock the staff should be able to identify yours from a catalog and order the correct ones. You might even be able to opt for a different/better composition of material.

Based upon your picture, you appear to have a Murray rider, and you have a couple of options:

Murray 56105/56105MA/24368 OEM $3.38 at Tulsa Engine Whse
Oregon 45-022 Aftermarket $2.44 at TEW
Rotary 9044 Aftermarket $2.21 at TEW
PrimeLine 7-04177 Aftermarket $1.58 at TEW

These part numbers are widely available on the internet. Tulsa Engine Warehouse is the cheapest, but their shipping is rather high. If you only need 2 or 4 pcs, suggest you continue to search even if unit price is higher with cheaper shipping charges.

Picture is of aftermarket equivalent; 1-3/8" OD x 5/8" ID x .702" Width

Picture of aftermarket part:

Thank you ggoyeneche. I found and ordered then from TEW. I have two units that use that bushing so I ordered enough to offset there flat rate.

You are a life saver and this forum has really helped me. Also thanks to all others that posted.

Jeff