Of course there are monster climbs in Colombia, but it's a February race. If you want those and are willing/able to deal with the commentary being in Spanish (and specifically the rather overexcitable Latin American style so familiar from soccer), tune in for the Vuelta a Colombia and the Clásico RCN, those get televised. I wish that they could give us a race that had the top stars and the best climbers of the South American péloton going all out, but it's not the early 80s anymore so we don't get strong fields at those 10-15 day races anymore sadly. And when we do get climbing races early season they tend to be Unipuerto. Could they do much better with the towns and cities that they're using while still not making the race too hard for a February race? Sure, definitely. But I'm afraid stages that look like queen stages at a Grand Tour or climbing monoliths like Letras are unlikely to ever be seen here. Vino as an MTF, being a legit HC climb, is a solid option in the circumstances.
As for monster climbs in Colombia - paved well enough to use in road racing - I can give you (I've bolded the true wall ones that seem to be particularly of interest to you):
Águila (22km, 6,5%)
Anzoátegui (31km, 5,1%)
Bocademonte (35km, 5,9%)
Boquerón (35km, 5,7%)
Boquerón de Chipaqué (27,7km, 6,1%)
Concordia (22km, 6,3%)
Crucero (28km, 6,2%)
Daza (39,5km, 5%)
El Pórtico (28km, 6,1%)
El Vino (30km, 5,7%)
Jericó (22km, 6,5%)
La China (12km, 9,2%)
La Coba Negra (25km, 5,8%)
La Cuchilla de Guasca (36km, 4,5%)
La Línea (22km, 7,7% OR 23km, 6,1%)
La Tribuna (29km, 5,6%)
La Uvita (25km, 5,9%)
Las Palmas (10km, 9,6%)
Letras (80km, 4% OR 31km, 5,7%)
Limonar (8,5km, 12,8%)
Loma del Escobero (9,6km, 9,7%)
Minas (42km, 4,3%)
Mondoñedo (26km, 5,7%)
Murillo (56km, 4,8%)
Nevado del Ruíz (36km, 5,5%)
Paramó del Berlin (57km, 4,7%)
Paramó del Verjón (33km, 5,3%)
San José de Miranda (33km, 5,4%)
Tequendama (37km, 5%)
Ventanas (34km, 5,4%)
Vilagarzón (19km, 7,8%, sterrato)
Zapatoca (14,4km, 7,7%)
There are also plenty of options they could use for shorter, super steep climbs, such as Cerro El Santísimo, on the shoulder of Paramó del Berlin. You could make a tougher version of Berlin by climbing all the way to the top from there but it's 8,4km at 9,4% to reach the junction where it links up to the main climb to Berlin, and the first 3km average 12,6%.