Are low security curves for ECDSA not supported?
I'm not sure, but I guess that two different openssl version or just builds could be done with or without support of Elliptic Curves with unsecure security levels.

Furthermore your curves have very low security level, and you shouldn't use them if security is a concern (and if it's not, you probably don't need ECDSA at all).

However, your assumption that "curve support is rather complicated" is wrong.

With libcrypto, the OpenSSL library, not the command line tool, you can use EC_GROUP_get_curve_GF to create your own elliptic curve. If you put in the parameters of those curves, you will be able to use them, with the library, even if the parameters are not encoded in OpenSSL.