I wasn't suggest you draw an accurate rendition of what you want but a rough sketch. A picture paints a thousand words.
Your description is still a little vague.
Quote: "i just need an arrow shape just like in the scroll bar of your iexplorer but the arrow only"
Is that really just the arrow or an arrow in a beveled box like iexplorer. If it is just the arrow then use a 'V' that's all it looks like to me. And how big do you want your arrow?
Also when you say 'units' I presume you mean pixels?
I have create 2 versions of the box and 2 versions of the scale thingy. I am still awaiting confirmation of what you want for the arrow. Are you sure you want them this small? There really isn't much I can do with onlt an 8x4 pixel image.