Unlike other Windows apps, AutoCAD will not fake a bold for a Truetype font that doesn't have a bold version in its family.
-- David William Edwards
SHXConvert - Replace SHX fonts in a DWG with component objects/Blocks Compile/Decompile SHX fonts without AutoCAD Announcing "PROJECT NEWPLEX - THE NEW STANDARD" FONTasm! - Truetype to Filled SHX Font/DXF File Converter CAD Font Services - Creation, Conversion, Customization http://www.tcfonts.com
There are a couple of SHX fonts that might work for you. Go to CADDEPOT.COM or one of the other web sites offering free downloads and look fonts named HAND1, FREEHAND, or ARCHS.
No, they won't be exactly like Cityblueprint but, being shx fonts you might come to use them if you want to play with their characteristics and, you'll find that your file size stays smaller than using TTF fonts.