Need location of "sane-backends = *" package

Linux RHEL 6, rpm install fails with dependency issue

[charliev@oc1747356616 482E-B93E]$ su -c "rpm -Uvh hplip-3.12.4_rhel-6.0.x86_64.rpm"
Password:
error: Failed dependencies:
 libsane.so.1()(64bit) is needed by hplipfull-3.12.4-0.x86_64

Next rpm provides the libsane.so.1 dependancy:

[charliev@oc1747356616 482E-B93E]$ su -c "rpm -Uvh sane-backends-libs-1.0.21-3.el6.x86_64.rpm"
Password:
warning: sane-backends-libs-1.0.21-3.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
error: Failed dependencies:
 sane-backends = 1.0.21-3.el6 is needed by sane-backends-libs-1.0.21-3.el6.x86_64

Tried the below rpm which is similar to "sane-backends = 1.0.21-3.el6"

[charliev@oc1747356616 482E-B93E]$ su -c "rpm -Uvh sane-backends-1.0.21-3.el6.x86_64.rpm"
Password:
warning: sane-backends-1.0.21-3.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
error: Failed dependencies:
 libsane.so.1()(64bit) is needed by sane-backends-1.0.21-3.el6.x86_64

Kind of like a catch-22 here. What am I missing here?