A picture is worth a couple of words
Cut 1/2 inside diameter PVC to 5 inch lengths. Cut one 4 inches.
cut scrap plastic into 3/4 inch pieces (I used old VCR tape cases)
super glue onto the end of the pipe. make sure it sits long enough to cure.
With file or belt sander sand off excess plastic so it leaves the pipe smooth all around.
cut base shape from scrape 1 inch board (really it is only3/4 in)
Let me know if you want my pattern but it depends on how many blade holders you want.
drill 5/8th holes 1 inch by 1-1/2 apart with spade bit so just the point comes out leaving a thin "floor".
The covers are the pipe caps.
The four inch front pipe holds the blade in current use.
blades usually come with labels that I just tape on.
Hope this helps feel free to ask any questions if I didn't make something quite clear. Hope this works for you. Sizes can be adjusted. Bigger pipe, bigger holes etc.