Centurion Handlebar Uprising

[Crummy]

Greetings,
I purchased a 1986 Centurion Accordo road bike at a garage sale last summer for $10 and it had original equipment. I have since replaced the tires and pedals and would like to raise the handlebars that I have already raised to the limit marker on the stem. I would like to purchase a new longer adjustable stem, but after seeing all the different sizes listed on the bike parts web sites I am bewildered as to my needs. I realize it is an old obscure bike, but would anyone possible know what stem and handlebar size it has or how I can determine the sizes?

Your help is greatly appreciated.

I gotten this far entering this post twice already, then attempted to include a photo, at which point I lost it all. I will look into the "Help" menu concerning posting photos and hope to have an image of the Accordo loaded before too long.

Thank You!

[nfmisso]

If you pull the handle bars all the way out; does it look something like this:
http://s211.photobucket.com/albums/bb8/dianemisso/Nigels%20Wheels%20042311%20A/Nigels%20Wheels%20042311%20B/Nigels%20Wheels%20042311%20C/?action=view&current=IMG_0433.jpg
with the fork still firmly attached to the frame?

I am betting it does.

Now either measure the diameter of the hole, or the diameter of the tube that goes into the hole.

I expect that it will be 22.2mm - which is called 1" or 25.4 mm for some reason.....

Then you have lots of choices.

For my project bike; I used one of these:
http://www.amazon.com/Origin8-Threaded-Threadless-Quill-Adapter/dp/B0037N6PEC/ref=sr_1_18?s=cycling&ie=UTF8&qid=1304344902&sr=1-18
and one of these:
http://www.amazon.com/Eleven81-Hi-Rise-Inch-Threadless-Bicycle/dp/B001DKUJLQ/ref=sr_1_1?s=cycling&ie=UTF8&qid=1304344991&sr=1-1