I am trying to refactor a razor script call into a stringly typed model. Here's the model...

using Ministry.Ministryweb.Models;

namespace Ministry.Ministryweb.ViewModels
{
    /// <summary>
    /// A model for the tem member card partial view.
    /// </summary>
    public class TeamMemberCardViewModel : MinistrywebBaseViewModel<TeamMember>
    {
        public TeamMemberCardViewModel(dynamic content)
        {
            InnerObject = new TeamMember(content);
        }

        public string JobTitle { get { return InnerObject.JobTitle; } }
        public string Email { get { return InnerObject.Email; } }
        public string Mobile { get { return InnerObject.Mobile; } }
        public int AvatarId { get { return InnerObject.AvatarNodeId; } }
    }
}

And the razor script is using it thusly...

@inherits MinistrywebViewPage<TeamMemberCardViewModel>

<div class="teamMember">
    <a href="@Model.Url"><img src="@Umbraco.Media(Model.AvatarId).umbracoFile" alt ="@Model.Name" /></a>
    <h4><a href="@Model.Url">@Model.Name</a></h4>
    <p><strong>@Model.JobTitle</strong><br />
        <a href="mailto:@Model.Email">@Model.Email</a>
        @if (!String.IsNullOrWhiteSpace(Model.Mobile))
        {
            <br />
            @Model.Mobile
        }
    </p>
</div>

I would, ideally, like to move this bit of code...

@Umbraco.Media(Model.AvatarId).umbracoFile

...into the model so, rather than exposing the ID, the model just exposes the URL. How can I get access to the umbracoFile property (The Media URL) without the UmbracoHelper?